<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>箭头函数</title>
    <script>
        function hello(a, b) {
            console.log(a + "+" + b + "=" + (a = b))
        }

        let hi = function (a, b) {
            console.log(a + "+" + b + "=" + (a = b))
        }

        let hehe = a => a


        hello(10,20)
        hi(10,20)
        hehe(10,20)

        let result= hehe(80);
        console.log(result)
    </script>
</head>
<body>

</body>
</html>